theme_preview_pick.h

Go to the documentation of this file.

 
#ifndef THEME_PREVIEW_PICK_H
#define THEME_PREVIEW_PICK_H
 
#include <ui/qt/utils/theme_manager.h>
 
#include <QColor>
#include <QCoreApplication>
#include <QFont>
#include <QHash>
#include <QImage>
#include <QList>
#include <QPalette>
#include <QPoint>
#include <QSize>
#include <QString>
 
#include <functional>
 
class QMouseEvent;
class QPainter;
class QRect;
class QWidget;

class ThemePreviewPick
{
    Q_DECLARE_TR_FUNCTIONS(ThemePreviewPick)
public:
    enum class Role { Text, Background, Border };

    struct Layer {
        ThemeManager::ThemeToken token = ThemeManager::NoRole;
        Role role = Role::Background;
        bool link = false;   
    };
 
    using TokenMap = QHash<ThemeManager::ThemeToken, ThemeColorPair>;

    static constexpr int kLinkKey = 0x3fff;

    static QColor keyColor(int key);

    static Layer decode(QRgb rgb);

    static TokenMap keyTokens();

    static QPalette keyPalette();

    static QFont keyFont(const QFont &font);

    static QImage keyCanvas(const QSize &size);

    static void paintKeyGlyph(QPainter *painter, const QString &svg_path, const QRect &rect,
                              ThemeManager::ThemeToken token);

    static Layer layerAt(const QImage &keys, const QPoint &pos, int text_height);

    static QList<Layer> layersAt(const QImage &keys, const QPoint &pos, int text_height);

    static QString roleName(const Layer &layer);

    static void saveImage(QWidget *source, const QString &suggested_name,
                          const std::function<void()> &dialog_closed);
};

class ThemePreviewPicker
{
public:
    using Render = std::function<QImage()>;
    using TextHeight = std::function<int()>;

    using HoverChanged = std::function<void(const ThemePreviewPick::Layer &layer, const QPoint &global_pos)>;

    ThemePreviewPicker(QWidget *owner, Render render, TextHeight text_height);

    void setEnabled(bool enabled);

    bool isEnabled() const { return enabled_; }

    void invalidate();

    void setHoverChanged(HoverChanged hover_changed);

    void resetHover();

    ThemePreviewPick::Layer layerAt(const QPoint &pos);

    QList<ThemePreviewPick::Layer> layersAt(const QPoint &pos);

    bool hover(const QPoint &pos);

    bool isPickClick(const QMouseEvent *event) const;
 
private:
    const QImage &keyImage();
 
    QWidget *owner_;
    Render render_;
    TextHeight text_height_;
    bool enabled_ = false;
    QImage image_;
    bool hover_token_ = false;  // The last move was over a color
    HoverChanged hover_changed_;
 
    Q_DISABLE_COPY_MOVE(ThemePreviewPicker)
};
 
#endif // THEME_PREVIEW_PICK_H